#include  <stdio.h>
#include  <stdlib.h>
#define    N    5
typedef struct node {
  int  data;
  struct node  *next;
} NODE;
/**********found**********/
NODE * fun(NODE *h)
{ NODE  *p, *q, *r;
  p = h;
  if (p == NULL)
    return NULL;
  q = p->next;
  p->next = NULL;
  while (q)
  {
/**********found**********/
    r = q->next;
    q->next = p;
    p = q;
/**********found**********/
    q = r ;
  }
  return  p;
}
NODE *creatlist(int  a[])
{  NODE  *h,*p,*q;        int  i;
   h=NULL;
   for(i=0; i<N; i++)
   {  q=(NODE *)malloc(sizeof(NODE));
      q->data=a[i];
      q->next = NULL;
      if (h == NULL)  h = p = q;
      else    {  p->next = q;  p = q;   }
   }
   return  h;
}
void outlist(NODE  *h)
{  NODE  *p;
   p=h;
   if (p==NULL)  printf("The list is NULL!\n");
   else
   {  printf("\nHead  ");
      do
      {  printf("->%d", p->data); p=p->next;  }
      while(p!=NULL);
      printf("->End\n");
  }
}
void main()
{  NODE  *head;
   int  a[N]={2,4,6,8,10};
   head=creatlist(a);
   printf("\nThe original list:\n");
   outlist(head);
   head=fun(head);
   printf("\nThe list after inverting :\n");
   outlist(head);
}

